name: Build containers for a specific branch of 1.8
on:
  workflow_dispatch:
    inputs:
      ref:
        description: The code to build so a commit, branch, etc. The container image will be ghcr.io/fluent/fluent-bit/test/<this value>.
        required: true
        default: "1.8"

env:
  IMAGE_NAME: ghcr.io/${{ github.repository }}/test/${{ github.event.inputs.ref }}

jobs:
  build-legacy-branch-meta:
    runs-on: ubuntu-latest
    permissions:
      contents: read
    steps:
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          ref: ${{ inputs.ref }}

      - name: Check this is a 1.8 type build
        run: |
          if [[ -f "dockerfiles/Dockerfile" ]]; then
            echo "Invalid branch as contains Dockerfile: ${{ inputs.ref }}"
            exit 1
          fi
        shell: bash

  # For 1.8 builds it is a little more complex so we have this build matrix to handle it.
  # This creates separate images for each architecture.
  # The later step then creates a multi-arch manifest for all of these.
  build-legacy-images-matrix:
    name: Build single arch legacy images
    runs-on: ubuntu-latest
    needs:
      - build-legacy-branch-meta
    strategy:
      fail-fast: false
      matrix:
        arch: [amd64, arm64, arm/v7]
        include:
          - arch: amd64
            suffix: x86_64
          - arch: arm/v7
            suffix: arm32v7
          - arch: arm64
            suffix: arm64v8
    permissions:
      contents: read
      packages: write
    steps:
      - name: Checkout the docker build repo for legacy builds
        uses: actions/checkout@v4
        with:
          repository: fluent/fluent-bit-docker-image
          ref: "1.8" # Fixed to this branch

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v3

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Log in to the Container registry
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - id: debug-meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.IMAGE_NAME }}
          tags: |
            raw,${{ inputs.ref }}-debug

      - name: Build the legacy x86_64 debug image
        if: matrix.arch == 'amd64'
        uses: docker/build-push-action@v5
        with:
          file: ./Dockerfile.x86_64.debug
          context: .
          tags: ${{ steps.debug-meta.outputs.tags }}
          labels: ${{ steps.debug-meta.outputs.labels }}
          provenance: false
          platforms: linux/amd64
          push: true
          load: false
          build-args: |
            FLB_TARBALL=https://github.com/fluent/fluent-bit/tarball/${{ inputs.ref }}

      - name: Extract metadata from Github
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.IMAGE_NAME }}
          tags: |
            raw,${{ matrix.suffix }}-${{ inputs.ref }}

      - name: Build the legacy ${{ matrix.arch }} image
        uses: docker/build-push-action@v5
        with:
          file: ./Dockerfile.${{ matrix.suffix }}
          context: .
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          platforms: linux/${{ matrix.arch }}
          provenance: false
          push: true
          load: false
          build-args: |
            FLB_TARBALL=https://github.com/fluent/fluent-bit/tarball/${{ inputs.ref }}

  # Create a multi-arch manifest for the separate 1.8 images.
  build-legacy-image-manifests:
    name: Deploy multi-arch container image manifests
    permissions:
      contents: read
      packages: write
    runs-on: ubuntu-latest
    needs:
      - build-legacy-branch-meta
      - build-legacy-images-matrix
    steps:
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Log in to the Container registry
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Pull all the images
        # Use platform to trigger warnings on invalid image metadata
        run: |
          docker pull --platform=linux/amd64  ${{ env.IMAGE_NAME }}:x86_64-${{ inputs.ref }}
          docker pull --platform=linux/arm64  ${{ env.IMAGE_NAME }}:arm64v8-${{ inputs.ref }}
          docker pull --platform=linux/arm/v7 ${{ env.IMAGE_NAME }}:arm32v7-${{ inputs.ref }}
        shell: bash

      - name: Create manifests for images
        run: |
          docker manifest create ${{ env.IMAGE_NAME }}:${{ inputs.ref }} \
            --amend ${{ env.IMAGE_NAME }}:x86_64-${{ inputs.ref }} \
            --amend ${{ env.IMAGE_NAME }}:arm64v8-${{ inputs.ref }} \
            --amend ${{ env.IMAGE_NAME }}:arm32v7-${{ inputs.ref }}
          docker manifest push --purge ${{ env.IMAGE_NAME }}:${{ inputs.ref }}
        env:
          DOCKER_CLI_EXPERIMENTAL: enabled
        shell: bash